package miggy.cpu.instructions.move;

import miggy.cpu.DataSize;
import miggy.cpu.DecodedInstruction;
import miggy.cpu.Sys;
import miggy.cpu.operands.OperandFactory;

/*
//  Miggy - Java Amiga Emulator
//  Copyright (c) 2008, Tony Headford
//  All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
//  following conditions are met:
//
//    o  Redistributions of source code must retain the above copyright notice, this list of conditions and the
//       following disclaimer.
//    o  Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
//       following disclaimer in the documentation and/or other materials provided with the distribution.
//    o  Neither the name of the Miggy Project nor the names of its contributors may be used to endorse or promote
//       products derived from this software without specific prior written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
//  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
//  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
//  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
//  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
//  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
//  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// $Revision: 2 $
*/
public class MOVEP
{
	public final DecodedInstruction decode(int address, int opcode, DataSize size)
	{
		DecodedInstruction di = new DecodedInstruction("movep" + size.ext(), opcode, address, size);
		int displacement = Sys.MEM.peekWord(address + 2);

		if((opcode & 0x0080) == 0)
		{
			di.setSrc(OperandFactory.addrIndDisplace((opcode & 0x007), displacement));
			di.setDst(OperandFactory.dataReg((opcode & 0x0e00) >> 9));
		}
		else
		{
			di.setSrc(OperandFactory.dataReg((opcode & 0x0e00) >> 9));
			di.setDst(OperandFactory.addrIndDisplace((opcode & 0x007), displacement));
		}
		return di;
	}
}
